CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 170,807	$ 171,310
Billed receivables, net of allowances of $4,823 and $5,738, respectively	71,256	77,773
Accrued receivables	9,824	9,578
Deferred income taxes, net	11,292	12,317
Prepaid expenses	14,531	13,369
Other current assets	10,470	10,462
Total current assets	288,180	294,809
Property and equipment, net	22,292	18,539
Software, net	25,357	25,366
Goodwill	219,315	203,935
Other intangible assets, net	21,762	20,448
Deferred income taxes, net	28,776	28,143
Other noncurrent assets	7,965	10,289
TOTAL ASSETS	613,647	601,529
Current liabilities
Accounts payable	12,703	15,263
Accrued employee compensation	23,127	26,174
Deferred revenue	131,735	121,936
Income taxes payable	1,784	6,181
Alliance agreement liability	1,600	1,917
Note payable under credit facility	75,000	75,000
Accrued and other current liabilities	19,722	24,293
Total current liabilities	265,671	270,764
Deferred revenue	30,035	31,045
Alliance agreement noncurrent liability	20,667	20,667
Other noncurrent liabilities	17,734	23,430
Total liabilities	334,107	345,906
Commitments and contingencies (Note 12)
Stockholders' equity
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued and outstanding at June 30, 2011 and December 31, 2010
Common stock, $0.005 par value; 70,000,000 shares authorized; 40,821,516 shares issued at June 30, 2011 and December 31, 2010	204	204
Common stock warrants	24,003	24,003
Treasury stock, at cost, 7,352,722 and 7,548,752 shares outstanding at June 30, 2011 and December 31, 2010, respectively	(167,286)	(171,676)
Additional paid-in capital	316,695	312,947
Retained earnings	116,711	105,289
Accumulated other comprehensive loss	(10,787)	(15,144)
Total stockholders' equity	279,540	255,623
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 613,647	$ 601,529